WindO/I-NV4 User’s Manual 3-83
5 User Communication
3
Communication
Receive command: Command Settings dialog box settings
Operation for receive command
1 Change the trigger condition LM202 from 0 to 1 to be ready for receiving user communication.
2 Data is transmitted from the external device and the transmitted data is received and processed.
The receive data is as follows.
• The receive data is compared with the character data, and the value of the matching Index No. (10 (Dec)) is stored
in Index Device Address LDR230.
• The 2 bytes (specified with Skip) of the receive command data 43h and 44h are ignored.
• Since the Reference Device Address LDR 230 of Device Address of the receive command data is 10 (Dec), the
data is stored in the device address LDR250 and LDR251, which is offset by +10.
• [STX] ABCD1234 is calculated with BCC of receive command data and compared with 3032h.
- When Calculation Start Position is 1 and Calculation End Position is 0: Calculates the range STX ABCD1234.
Item Setting
Type RXD
Trigger Condition While ON, Device Address: LM202
Completed Device Address LM203
Not Clear Completed Device
Address automatically
No
Status Device Address LDR260
Receiving Time Out 0 (No Receive Time Out)
Comment RXD command
Command
Data Settings dialog box
settings
Constant
(Hexadecimal)
'02'
Registering
Constant
(Character)
10: "AB", 20: "CD", Index Device Address: LDR230
Skip 2 bytes
Device Address
Conversion Type: No conversion, from Upper byte,
Number of bytes: 2, Words: 2
Device Address: LDR240, Reference Device Address: LDR230
BCC
Calculation Start Position: 1 Calculation End Position: 0, XOR
Hexadecimal to ASCII, 2 bytes
Constant
(Hexadecimal)
'0D''0A'
3
(33h)
4
(34h)
1
(31h)
STX
(02h)
2
(32h)
A
(41h)
B
(42h)
C
(43h)
D
(44h)
Skip
CR
(0Dh)
LF
(0Ah)
0
(30h)
2
(32h)
BCC
Constant
(Hexadecimal)
Device Address
Constant
(Hexadecimal)
Command settings:
Registering
Constant (Character)
Receive data:
Received data
Compare
A
(41h)
B
(42h)
Order of reception
10LDR230:
Value of the Index Device Address
AB10:
CD20:
DataIndex No.
Number of
Registering
Constants: 2
(DEC)
0000hLDR240:
0000hLDR241:
3132hLDR250:
Value of Device Address
LDR230=10
(1) (2) (3) (4) (5) (6) (7) (8) (9)
Calculation Start Position:
(5) (4) (3)(8) (7) (6) (2) (1) (0)
Calculation End Position:
3
(33h)
4
(34h)
1
(31h)
STX
(02h)
2
(32h)
A
(41h)
B
(42h)
C
(43h)
D
(44h)
CR
(0Dh)
LF
(0Ah)
0
(30h)
2
(32h)
Data used for BCC calculation
To Next Page
Loading...
General